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在EN60950-2005中有如下内容:% x% t9 R- u" E0 C& ~
2.6.5.3 Disconnection of protective earth1 _5 Q9 [9 }7 T x8 S
Protective earthing connections shall be such that disconnection of a protective earth at one! y& M- P/ \, A! }& w: f
point in a unit or a system does not break the protective earthing connection to other parts or
! q$ n+ |/ y. R; x! m; g9 Y, Runits in a system, unless the relevant hazard is removed at the same time.
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意思就是说地线你可以接在一起,但是当你把其中一个地线断开后不能影响到别的部分的接地8 ]* J9 X( `3 o+ I
(protective earthing),只要不违背这个原则就可以,当然还要可靠才行。 |
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